Dude, I love the idea of this fight but almost a year ago I made a battle between 6-B Kenshiro and Kaido (before Ken got upgraded to High 6-A/5-C at his peaK) and the verdict was that Ken stomped.
Here:
https://vsbattles.com/threads/kenshiro-vs-kaido.121295/
Kaido upscales from 63 teratons, which while stronger than 30% Beginning-of Series Raoh isn't stronger by that much and nowhere near enough to make up for Raoh's insane hax, never mind that Raoh can go to 182 teratons, almost 3x Kaido's power, which is just overkill.
As for speed, it's actually about the same.
Kaido = Big Mom = Marco, who is about 3.616c
100% Raoh = 3.33x Base Raoh >= Juza >> Garuda = 1c
So while 100% Raoh is "officially" 3.33c, it's likely much higher since he is 3.33x faster than someone who is far above the speed of light, meaning he upscales.
So Kaido has to hope that he can beat Raoh before he goes 100% and evens the speed gap, otherwise Kaido is
screwed.
And the power gap between them is nowhere
near enough for Kaido to one-shot 30% Raoh, especially since Raoh is just as much, if not
more of a stamina monster than Kaido is. He's lost like a gallon of blood in his fights with Kenshiro yet refuses to back down. He can edure having his own heart, lungs, and ribs destroyed (according to his profile).
So this is kind of a stomp, except Kaido technically has a wincon if he manages to overwhelm 30% Raoh before he can go 100%, but I don't see that happening in most cases, so I give this to Raoh.
Also, Raoh can just go 100% from the get-go if his precog lets him realize that Kaido is faster and stronger than his 30%, something that Kaido would likely allow due to his desire to fight strong opponents and his honor code.